drivers/net/usb/sierra_net.c: removes unnecessary semicolon

removes unnecessary semicolon

Found by Coccinelle: http://coccinelle.lip6.fr/Signed-off-by: NPeter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/usb/sierra_net.c

@@ -838,7 +838,7 @@ static int sierra_net_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
 				netdev_err(dev->net, "HIP/ETH: Invalid pkt\n");
 
 			dev->net->stats.rx_frame_errors++;
-			/* dev->net->stats.rx_errors incremented by caller */;
+			/* dev->net->stats.rx_errors incremented by caller */
 			return 0;
 		}